CN209425180U - A kind of outer alley grinding machine - Google Patents
A kind of outer alley grinding machine Download PDFInfo
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- CN209425180U CN209425180U CN201822218319.8U CN201822218319U CN209425180U CN 209425180 U CN209425180 U CN 209425180U CN 201822218319 U CN201822218319 U CN 201822218319U CN 209425180 U CN209425180 U CN 209425180U
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- 229910000831 Steel Inorganic materials 0.000 description 1
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Abstract
The utility model discloses a kind of outer alley grinding machine, including lathe bed, Z axis slide carriage, X-axis slide carriage, Y-axis slide carriage, workpiece mounting device, grinding attachment and tailstock, workpiece mounting device and tailstock are mounted on the front end portion on lathe bed top；Lathe bed rear end part is equipped with linear motor and rolling guide one, and rolling guide one is divided into the two sides of linear motor；One tip shelf of rolling guide is equipped with Z axis slide carriage, and Z axis slide carriage top is equipped with first motor, and first motor is sequentially connected by the first screw rod and X-axis slide carriage；It is provided with Y-axis slide carriage on X-axis slide carriage, the second motor is installed on Y-axis slide carriage, the second motor is sequentially connected by the second screw rod and grinding attachment, and grinding attachment is between workpiece mounting device and tailstock.The utility model is not only simple in structure, easy to use, and the processing of multiple outer alley grindings of part can be realized in clamped one time, is substantially increased into and is produced efficiency.
Description
Technical field
The utility model belongs to numerical control machine tool technique field, more particularly to a kind of outer alley grinding machine.
Background technique
Grinding machine is the lathe for carrying out grinding to workpiece surface using grinding tool.Most of grinding machine be using
High-speed rotating grinding wheel carries out grinding, and a small number of is processed using other grinding tools such as oilstone, abrasive band and free abrasive,
Such as honing machine, superfinisher, abrasive belt grinding machine, grinder and polishing machine.Grinding machine is capable of processing the higher material of hardness, such as quenches
Hard steel, hard alloy etc.；Also it is capable of processing fragile material, such as glass, granite.Grinding machine can make high-precision and surface roughness very little
Grinding, also can be carried out efficient grinding, such as high-rate grinding.At present for producing CVT automatic gear-box in enormous quantities actively
The grinding machine of pulley shaft and passive pulley shaft high-precision Model For The Bush-axle Type Parts, not only structure is complicated, and manufacturing cost is high, and primary
Clamping can only realize an outer alley grinding of part, at production low efficiency.
Therefore, how to provide that a kind of structure is simple, outer alley grinding machine of high production efficiency becomes art technology
The problem of personnel's urgent need to resolve.
Utility model content
In view of this, the present invention provides a kind of outer alley grinding machines, are not only simple in structure, easy to use, and
And the processing of multiple outer alley grindings of part can be realized in clamped one time, it substantially increases into and produces efficiency.
To achieve the goals above, the utility model adopts the following technical solution:
A kind of outer alley grinding machine, comprising: lathe bed, Z axis slide carriage, X-axis slide carriage, Y-axis slide carriage, workpiece mounting device, mill
Turning device and tailstock, the workpiece mounting device and tailstock are installed in the front end portion on the lathe bed top, and the tailstock
Positioned at the tail end of the workpiece mounting device；The lathe bed rear end part is equipped with linear motor and rolling guide along Z-direction
One, the rolling guide one is divided into the two sides of the linear motor；One tip shelf of rolling guide is equipped with Z axis slide carriage, institute
It states Z axis slide carriage top and first motor is installed, the first motor is sequentially connected by the first screw rod and the X-axis slide carriage；Institute
It states and is provided with Y-axis slide carriage on X-axis slide carriage, the second motor is installed on the Y-axis slide carriage, second motor passes through the second screw rod
It is sequentially connected with the grinding attachment, the grinding attachment is between the workpiece mounting device and the tailstock.
Further, the workpiece mounting device includes that work spindle, the floating type self-centering chuck of three-jaw and chuck are top, institute
Work spindle tail end and the floating type self-centering chuck assembly connection of the three-jaw are stated, the top head end of chuck and the three-jaw are floating
The self-centering chuck of dynamic formula is connected, and tail end resists workpiece.
Further, grinding attachment includes mounting base, grinding axis, pole wheel and grinding wheel, the mounting base with described second
Bar is threadedly coupled, and the grinding axis runs through the mounting base, and the grinding axis bottom end is connected with the pole wheel, the grinding wheel
It is mounted on the pole wheel bottom end.
Further, the tailstock includes rolling guide two, lower layer's slide carriage, rolling guide three, cylinder and upper layer slide carriage, described
Rolling guide two is mounted on the lathe bed top, and lower layer's slide carriage bottom end is arranged on the rolling guide two, and top is fixed
Have the rolling guide three and cylinder, the upper layer slide carriage is erected on the rolling guide three, and with the cylinder output
It is connected；The upper layer slide carriage head end is equipped with that tail portion is top, and the top head end in tail portion resists the pole wheel.
Further, the side of lower layer's slide carriage is provided with retaining mechanism.
Further, the tail end of the tailstock is provided with trimmer.
Further, the trimmer includes trimmer main shaft and diamond roller, and trimmer main shaft bottom end is mounted on
On the lathe bed, top is connected with the diamond roller.
Further, the lathe bed top is also equipped with detection device, and the detection device is located at below the grinding attachment.
Further, the rear end part on the lathe bed top is additionally provided with photoelectric limit switch, the photoelectric limit switch position
In the side of the rolling guide one.
Further, damping block is provided on the rolling guide one.
The utility model has the beneficial effects that:
The utility model drives Z axis slide carriage to move along Z axis by linear motor, and first motor drives X-axis slide carriage and Y-axis to slip
Plate is moved along X-axis, and the second motor drives grinding attachment to move along Y-axis, to realize the location of workpiece along Z axis, X-axis and Y-axis three
The automatic adjustment of a freedom degree, consequently facilitating the installation and grinding of workpiece, easy to operate, precision is high；It can be real in clamped one time
The process of more alleys of existing part, can be used for producing in enormous quantities, have high precision and reliability, and have extremely strong
Adaptive capacity to environment, greatly improve the production capacity of user, and operating cost is low, user made effectively to have saved system
This is caused, the advantage of competition is enhanced, instead of import lathe, has filled up the blank of domestic automobile industry device.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is the embodiments of the present invention, for those of ordinary skill in the art, without creative efforts, also
Other attached drawings can be obtained according to the attached drawing of offer.
Fig. 1 attached drawing is the structural schematic diagram of the utility model.
Fig. 2 attached drawing is the structural schematic diagram of the utility model lathe bed.
Fig. 3 attached drawing is the mounting structure schematic diagram of the utility model first motor and the first screw rod.
Fig. 4 attached drawing is the structural schematic diagram of the utility model rolling guide one.
Fig. 5 attached drawing is the utility model work pieces process structural schematic diagram.
Fig. 6 attached drawing is the Local map of the utility model work pieces process.
Fig. 7 attached drawing is the structural schematic diagram of the utility model tailstock.
Fig. 8 attached drawing is the working drawing of the utility model crushing.
Fig. 9 attached drawing is the detection figure of the utility model workpiece alley.
Wherein, in figure,
1- lathe bed；2-Z axis slide carriage；3-X axis slide carriage；4-Y axis slide carriage；5- work spindle；6- is ground axis；7- tailstock；8- is repaired
Whole device main shaft；9- rolling guide one；10- linear motor；11- first motor；12- shaft coupling；The first screw rod of 13-；14- bearing is multiple
Close structure；15- guide rail slide block；16- damping block；The floating type self-centering chuck of 17- three-jaw；18- chuck is top；19- workpiece；20-
Pole wheel；21- grinding wheel；The tail portion 22- is top；The upper layer 23- slide carriage；24- lower layer slide carriage；25- rolling guide two；26- retaining mechanism；
27- cylinder；28- adjustment mechanism；29- diamond roller；30- detection device；31- mounting base；The second motor of 32-；33- second
Bar；34- rolling guide three；35- optoelectronic switch.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Please refer to attached drawing 1-9, the utility model provides a kind of outer alley grinding machine, comprising: lathe bed 1, Z axis slide carriage 2,
X-axis slide carriage 3, Y-axis slide carriage 4,19 mounting device of workpiece, grinding attachment and tailstock 7,19 mounting device of workpiece and tailstock 7 are respectively mounted
In the front end portion on 1 top of lathe bed, and tailstock 7 is located at the tail end of 19 mounting device of workpiece；1 rear end part of lathe bed is along Z-direction
Linear motor 10 and rolling guide 1 are installed, rolling guide 1 is divided into the two sides of linear motor 10；Rolling guide 1 pushes up
End-rack is equipped with Z axis slide carriage 2, and 2 top of Z axis slide carriage is equipped with first motor 11, and first motor 11 is slipped by the first screw rod 13 with X-axis
Plate 3 is sequentially connected；It is provided with Y-axis slide carriage 4 on X-axis slide carriage 3, the second motor 32 is installed on Y-axis slide carriage 4, the second motor 32 is logical
It crosses the second screw rod 33 to be sequentially connected with grinding attachment, grinding attachment is located between 19 mounting device of workpiece and tailstock 7.First motor
11 are connect by shaft coupling 12 with the first screw rod 13 and the second motor 32 with the second screw rod 33.Body structure part and rear end
The device of part setting is all equipped with gas-liquid systems and electrical system.Lathe bed 1 is the artificial mineral casting for inlaying high-performance ironcasting
Pipeline, cable, trigger etc. are cast into artificial mineral casting by part, facilitate cutting fluid circulation and each motor cabling.Lathe bed 1
The middle concave surface that upper surface is high in surrounding, centre is low, side are equipped with oil return opening.First motor 11 and the second motor 32 are servo electricity
Machine, the first screw rod 13 and the second screw rod 33 are ball screw, the characteristic of low noise low vibration when having operating.X-axis slide carriage 3 with
One 9 junction of rolling guide is provided with guide rail slide block 15, and guide rail slide block 15 is lubricated by centralized lubrication mode, 13 He of the first screw rod
Second screw rod, 33 lead screw uses self-lubricating device, keeps the variation of torque in transmission process more more steady than traditional.
Linear motor 10 is symmetric configuration structure, reduces the mutual attractive force between slot effect and coil and magnet.
Operating rate is 60m/min, the feeding ability of 0.1 μm of resolution ratio.Z axis slide carriage 2, X-axis slide carriage 3 and Y-axis slide carriage 4 are all selected
The method that high-precision full pillar roller guide and damping block 16 cooperate, reduces the effect vibrated to grinding, guide rail datum level
By hand scraping, high-precision ensure that.The driving of Z axis slide carriage 2 realizes large span using the structure of 10 symmetric configuration of linear motor
The driving of slide carriage.Maximum speed requires that 120m/min can be reached, while realizing the feeding ability of 0.1 μm of resolution ratio.X-axis slide carriage
3 and Y-axis slide carriage 4 be linear rolling track guiding and ball screw driving structure, 33 both ends of the first screw rod 13 and the second screw rod
Spring bearing use thrust roller bearing composite construction 14, i.e. bearing and bearing cap integral structure；The combination of screw rod bearing
Pre-stretching structure and low noise low vibration high precision ball screw rod, realize feed system high rigidity and system it is micro
Feeding ability, axial rigidity and resistance to capsizing are far longer than common angular contact ball bearing in groups.
19 mounting device of workpiece includes 19 main shaft 5 of workpiece, the floating type self-centering chuck 17 of three-jaw and chuck top 18, workpiece
19 main shaft, 5 tail end and floating type self-centering 17 assembly connection of chuck of three-jaw, top 18 head end of chuck and three-jaw are floating type self-centering
Chuck 17 is connected, and tail end resists workpiece 19.19 main shaft 5 of workpiece has selected high-precision main shaft bearing, the installation of 19 main shaft of workpiece, 5 bearing
The bearing mounting hole Precision Machining of 5 cabinet of face and 19 main shaft of workpiece realizes 19 main shaft of workpiece, 5 precision by precision assembly.Chuck
Top 18 play certralizing ability, and the floating type self-centering chuck 17 of three-jaw is in quick condition, and auxiliary clamping workpiece 19 passes through air pressure
Clamping force is adjusted, the driving of 19 main shaft 5 of workpiece uses inner electric machine, maximum speed 3000r/min.19 main shaft 5 of workpiece is using symmetrical
The design of formula structure, 19 main shaft of workpiece, 5 pivoting part balance accuracy grade are less than G0.2, it is ensured that 19 main shaft 5 of workpiece runs at high speed down
With small vibration, overall dynamics performance is good.19 main shaft of workpiece, the 5 high-accuracy bearing of Selection of Bearings, the dynamic stiffiness of whole system are good.Rationally
Processing and assembly technology guarantee 19 main shaft of workpiece, 5 end circular runout be no more than 0.002mm.Using thermostatted water circulating cooling electricity
Machine stator and front and back bearings take away 19 main shaft of workpiece, 5 inner most heat.19 main shaft of workpiece, 5 end configures air seal set.It follows
The cooling rational design with air seal structure of ring provides reliable guarantee in long time running for 19 main shaft 5 of workpiece.
Grinding attachment includes mounting base 31, grinding axis 6,21 bar 20 of grinding wheel and grinding wheel 21, mounting base 31 and the second screw rod 33
It is threadedly coupled, grinding axis 6 runs through mounting base 31, and is ground 6 bottom end of axis and is connected with 21 bar 20 of grinding wheel, and grinding wheel 21 is mounted on grinding wheel 21
20 bottom end of bar.It is ground 6 front end of axis and air seal set is housed, tail portion is equipped with cable connector and cooling pipe fitting.Grinding wheel 21 is respectively completed
The grinding of three alleys.It is ground 6 front end of axis and air seal set is housed, can enter to avoid dust, abrasive grain；21 bar 20 of grinding wheel uses spiral shell
Line type of attachment, tail cable connector use 90 ° of elbows, avoid the flexure of cable；Remaining cooling pipe fitting and oil gas profit
Slip joint is through type connector.
Tailstock 7 includes rolling guide 2 25, lower layer's slide carriage 24, rolling guide 3 34, cylinder 27 and upper layer slide carriage 23, is rolled
Guide rail 2 25 is mounted on 1 top of lathe bed, and 24 bottom end of lower layer's slide carriage is arranged on rolling guide 2 25, and top is fixed with rolling guide
3 34 and cylinder 27, upper layer slide carriage 23 be erected on rolling guide 3 34, and be connected with 27 output end of cylinder；Upper layer slide carriage 23 is first
End is equipped with tail portion top 22, and top 22 head end in tail portion resists 21 bar 20 of grinding wheel.Upper layer slide carriage 23 is oriented to by rolling guide 3 34,
Cylinder 27 drives, stroke 50mm.24 part of lower layer's slide carriage is oriented to by rolling guide 2 25, and the side of lower layer's slide carriage 24 is provided with
Retaining mechanism 26 is by 26 positioning and locking of retaining mechanism, stroke 250mm, upper layer slide carriage 23 and 24 total kilometres of lower layer's slide carriage
300mm.Upper layer slide carriage 23 is equipped with adjustment mechanism 28, can adjust tail portion top 22 in the displacement of X-direction, keeps it top with chuck
18 with one heart.Tail portion top 22 is using full alloy steel.
In another embodiment, the tail end of tailstock 7 is provided with trimmer, and trimmer is mounted on the mounting angle plate of lathe bed 1
On, AE acoustic emission system sensor built in trimmer.
In another embodiment, trimmer includes trimmer main shaft 8 and diamond roller 29,8 bottom end of trimmer main shaft
It is mounted on lathe bed 1, top is connected with diamond roller 29.8 top end of trimmer main shaft is filled with molding diamond roller 29,
It can ensure that dressing process medium plain emery wheel 21 can be realized higher metal wear self-repair, lower surface roughness and avoid being ground
Shape, can be precisely duplicated on grinding wheel 21 by burn phenomenon.Trimmer main shaft 88, maximum speed is up to 16000RPM, power
1.7kW.It is equipped with AE and is ground monitoring unit ELASO, grinding wheel 21 is modified image and can directly be shown by display screen.
In another embodiment, 1 top of lathe bed is also equipped with detection device 30, and detection device 30 is located under grinding attachment
Side.Detection device 30 uses magnetic induction switch, and alley position is determined by the distance change to alley, and measurement method is non-connects
Touch measurement.
In another embodiment, the rear end part on 1 top of lathe bed is additionally provided with photoelectric limit switch, photoelectric limit switch
Positioned at the side of rolling guide 1.
In another embodiment, it is provided with damping block 16 on rolling guide 1, for reducing on rolling guide 1
Vibration improves processing quality, extends the component life under vibration condition.Oil film is generated between damping block 16 and rolling guide 1
The effect of damping vibration, damping increases with damping area and gap width and is increased.In operation, rolling guide 1 and damping block
16 do not contact with each other, and oil film reaches damping area by the oilhole at 16 back side of damping block.
In another embodiment, lathe shield is installed on lathe, is mounted with explosion-proof valve gear at the top of lathe shield, is led to
Reliable quickly discharge is crossed, lathe is from destroying.
In another embodiment, mist filtration system is installed at the top of lathe shield, absorbs the mist of oil generated when processing, drop
The explosion of the low excessively high generation of oil mist concentration.
In another embodiment, lathe is equipped with automatic fire extinguisher device, arranges temperature sensor inside lathe, works as sensing
When device detects that temperature is more than limit value, device can start fire-extinguishing function concurrently automatically.
In another embodiment, from lathe integral structure layout, using whole shape cooling structure, processing space is stabilized
Temperature.Lathe uses Siemens 840D control system.
The utility model drives Z axis slide carriage 2 to move along Z axis by linear motor 10, and first motor 11 drives X-axis slide carriage 3
It is moved with Y-axis slide carriage 4 along X-axis, the second motor 32 drives grinding attachment to move along Y-axis, to realize 19 position of workpiece along Z
The automatic adjustment of axis, X-axis and Y-axis three degree of freedom, consequently facilitating the installation and grinding of workpiece 19, easy to operate, precision is high；Energy
The process that more alleys of part are realized in clamped one time, can be used for producing in enormous quantities, with high precision and reliably
Property, and there is extremely strong adaptive capacity to environment, the production capacity of user is greatly improved, and operating cost is low, used
Manufacturing cost has effectively been saved at family, enhances the advantage of competition, instead of import lathe, has filled up domestic automobile industry device
Blank.
The utility model can be used for producing in enormous quantities automatic gear-box driving belt pulley shaft and passive pulley shaft high-precision, height are hard
Spend high speed, the highly-efficient processing of Model For The Bush-axle Type Parts.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part
It is bright.
The foregoing description of the disclosed embodiments can be realized professional and technical personnel in the field or using originally practical new
Type.Various modifications to these embodiments will be readily apparent to those skilled in the art, and determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the present invention will not be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The widest scope consistent with features of novelty.
Claims (10)
1. a kind of outer alley grinding machine characterized by comprising lathe bed, Z axis slide carriage, X-axis slide carriage, Y-axis slide carriage, workpiece peace
Assembling device, grinding attachment and tailstock, the workpiece mounting device and tailstock are installed in the front end portion on the lathe bed top, and
The tailstock is located at the tail end of the workpiece mounting device；The lathe bed rear end part along Z-direction be equipped with linear motor and
Rolling guide one, the rolling guide one are divided into the two sides of the linear motor；One tip shelf of rolling guide is equipped with Z axis
Slide carriage, Z axis slide carriage top are equipped with first motor, and the first motor is driven by the first screw rod and the X-axis slide carriage
Connection；It is provided with Y-axis slide carriage on the X-axis slide carriage, the second motor is installed on the Y-axis slide carriage, second motor passes through
Second screw rod and the grinding attachment are sequentially connected, the grinding attachment be located at the workpiece mounting device and the tailstock it
Between.
2. a kind of outer alley grinding machine according to claim 1, which is characterized in that the workpiece mounting device includes work
The floating type self-centering chuck of part main shaft, three-jaw and chuck are top, and the work spindle tail end and the three-jaw are floating type self-centering
Chuck assembly connection, the top head end of chuck are connected with the floating type self-centering chuck of the three-jaw, and tail end resists workpiece.
3. a kind of outer alley grinding machine according to claim 1 or 2, which is characterized in that grinding attachment include mounting base,
Grinding axis, pole wheel and grinding wheel, the mounting base are connect with second wire rod thread, and the grinding axis runs through the installation
Seat, and the grinding axis bottom end is connected with the pole wheel, the grinding wheel is mounted on the pole wheel bottom end.
4. a kind of outer alley grinding machine according to claim 3, which is characterized in that the tailstock includes rolling guide
Two, lower layer's slide carriage, rolling guide three, cylinder and upper layer slide carriage, the rolling guide two is mounted on the lathe bed top, under described
Layer slide carriage bottom end is arranged on the rolling guide two, and top is fixed with the rolling guide three and cylinder, the upper layer slide carriage
It is erected on the rolling guide three, and be connected with the cylinder output；It is top that the upper layer slide carriage head end is equipped with tail portion,
The top head end in tail portion resists the pole wheel.
5. a kind of outer alley grinding machine according to claim 4, which is characterized in that the side of lower layer's slide carriage is arranged
There is retaining mechanism.
6. a kind of outer alley grinding machine according to claim 4, which is characterized in that the tail end of the tailstock, which is provided with, to be repaired
Whole device.
7. a kind of outer alley grinding machine according to claim 6, which is characterized in that the trimmer includes trimmer master
Axis and diamond roller, trimmer main shaft bottom end are mounted on the lathe bed, and top is connected with the diamond roller.
8. a kind of outer alley grinding machine according to claim 1, which is characterized in that the lathe bed top is also equipped with inspection
Device is surveyed, the detection device is located at below the grinding attachment.
9. a kind of outer alley grinding machine according to claim 1 or 8, which is characterized in that the rear end on the lathe bed top
Part is additionally provided with photoelectric limit switch, and the photoelectric limit switch is located at the side of the rolling guide one.
10. a kind of outer alley grinding machine according to claim 1, which is characterized in that be arranged on the rolling guide one
There is damping block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822218319.8U CN209425180U (en) | 2018-12-27 | 2018-12-27 | A kind of outer alley grinding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822218319.8U CN209425180U (en) | 2018-12-27 | 2018-12-27 | A kind of outer alley grinding machine |
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| Publication Number | Publication Date |
|---|---|
| CN209425180U true CN209425180U (en) | 2019-09-24 |
Family
ID=67974162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822218319.8U Active CN209425180U (en) | 2018-12-27 | 2018-12-27 | A kind of outer alley grinding machine |
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| CN (1) | CN209425180U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109571193A (en) * | 2018-12-27 | 2019-04-05 | 北京工研精机股份有限公司 | A kind of outer alley grinding machine |
| CN112935885A (en) * | 2021-02-10 | 2021-06-11 | 中国科学院金属研究所 | High-strength and high-brittleness material spheroid automatic turning machine tool |
-
2018
- 2018-12-27 CN CN201822218319.8U patent/CN209425180U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109571193A (en) * | 2018-12-27 | 2019-04-05 | 北京工研精机股份有限公司 | A kind of outer alley grinding machine |
| CN112935885A (en) * | 2021-02-10 | 2021-06-11 | 中国科学院金属研究所 | High-strength and high-brittleness material spheroid automatic turning machine tool |
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